The Ukrainian army says the Kremlin has launched 30 missile attacks on military and civilian targets.
They claim at least 40 people have died.
The country's president has urged people to join the army if they have experience, and to give blood.
Citizens have been seen in gridlocked traffic trying to flee the capital Kyiv, and queueing outside banks and cash machines.
Stock markets around the world have tumbled and oil prices have risen to an 8 year high.
Meanwhile, a retired Roscommon Brigadier General does not believe NATO will assist Ukraine as it's not a member country.
Speaking on the Joe Finnegan Show Ger Aherne says the invasion will not evoke a mutual defence pact because of its non-membership.
The Roscommon native also believes it will be difficult for Russia to guard a city like Kyiv.
